Birmingham's Digital Archives Are Drowning in Duplicate Images — Here's How the City Stacks Up Against Amsterdam and Toronto

Birmingham City Council's digital asset management system contains tens of thousands of photographs accumulated over two decades of urban regeneration, planning submissions and public communications work — and a significant portion of those files are duplicates. The problem, long treated as a low-priority housekeeping matter, is now costing real money as storage licensing fees rise and staff hours are consumed hunting for master copies of images.

The issue has sharpened in urgency this year because Birmingham's planning department, based at 1 Lancaster Circus in Queensway, moved to a new digital submission platform in early 2026. Uploading legacy imagery into the new system forced administrators to confront duplicate files that had been quietly multiplying since at least 2009. The council's IT procurement team has been reviewing deduplication software since March, according to public procurement notices posted on the West Midlands Combined Authority's contracts portal.

What Birmingham Is Doing — And What It Isn't

Two organisations in the city have moved furthest on the problem. The Library of Birmingham on Centenary Square, which holds the largest regional archive in Europe outside London, began a formal deduplication audit of its digitised photographic collections in January 2026. The project, run in partnership with the digital preservation team at Birmingham City University's Parkside building in Eastside, targets an estimated 1.2 million digital image files, some of which exist in three or more identical copies across different servers.

The West Midlands Police digital forensics unit operates under different constraints — evidential integrity rules mean files cannot simply be deleted — but the force has introduced hash-based verification software that flags identical images at the point of upload, preventing new duplicates from entering the system. That approach, while narrower in scope, has reduced redundant storage intake by a measurable margin since its rollout in autumn 2025, according to the unit's published annual technology report.

What the city largely lacks is a coordinated cross-departmental policy. Each council directorate manages its own image library, and Birmingham City Council's 2025 digital transformation strategy — a document running to 47 pages and published last September — does not mention image deduplication as a specific workstream.

How Other Cities Are Handling the Same Problem

Amsterdam's municipal archive, the Stadsarchief, completed a city-wide deduplication project in 2024 covering roughly 4.5 million digitised photographs. The project used perceptual hashing algorithms rather than simple file-matching, meaning near-identical images — the same photograph scanned twice at slightly different resolutions — were also caught. The Dutch project cost approximately €340,000 and freed up around 18 terabytes of server space, figures published in the Stadsarchief's 2024 annual accountability report.

Toronto's City Clerk's Office took a different route. Rather than retrospective cleanup, Toronto mandated in 2023 that all new image uploads to city systems pass through an automated deduplication check before storage is allocated. The policy, embedded in the city's corporate information management bylaw amendment passed in November 2023, means the archive does not grow the problem going forward, even if legacy duplicates remain unresolved.

Both approaches have advocates among information management professionals, and the contrast is instructive for Birmingham. The Amsterdam model costs more upfront and requires significant staff time to review flagged files that algorithms cannot resolve automatically. The Toronto model is cheaper to implement but leaves years of accumulated redundancy untouched.

Birmingham's digital storage costs are not broken down at a granular enough level in public budget documents to calculate what duplication is costing the city annually. That opacity is itself part of the problem: without a clear figure attached to the waste, there is little political pressure to prioritise a fix.

The Library of Birmingham audit, expected to conclude by December 2026, will produce a public report that could serve as a baseline for broader city policy. The Birmingham City University partnership also plans to publish methodology notes that smaller councils across the West Midlands could adapt. If the council's IT procurement review leads to a software contract by autumn, the city may have the tools in place — the harder task will be deciding who is responsible for using them.